Environmental Engineering Reference
In-Depth Information
Measured
S
+
T
under Fixed Solar Irradiance
and Varying hermal Differences
800
Measured
S
+
T
(DT5)
Measured
(DT7)
Measured
S
+
T
(DT10)
Solar (1010 lux)
hermal (DT5)
hermal (DT7)
hermal (DT10)
S
+
T
700
600
500
400
300
200
100
0
0
2
4
6
8
10
12
Voltage (V)
Measured
S
+
T
under Fixed Solar Irradiance
and Varying hermal Differences
800
Measured
S
+
T
(DT5)
Measured
(DT7)
Measured
S
+
T
(DT10)
Solar (1010 lux)
hermal (DT5)
hermal (DT7)
hermal (DT10)
S
+
T
700
600
500
400
300
200
100
0
0
50
100
150
200
Load Resistance (kΩ)
FIGURE 5.25
P-V and P-R curves of an HEH system at fixed solar irradiance of 1010 lux (3 W/m
2
) and different
thermal differences of 5 to 10 K.
converter to perform MPPT as proposed by Chulsung et al. [35]. Referring to
Figures 5.24
and
5.25
,
the P-V curves [Measured S+T (
T5) to Measured S+T
(
T10)] show that all the MPPs of the hybrid energy harvester are fixed at
around its output voltage of 3.6 V.
Likewise, for an illumination level of 380 lux and above as a common indoor
lighting condition, the hybrid energy harvester tested under fixed thermal
difference of 5 and 10 K, as shown in
Figures 5.26
and
5.27
, show that all of the
P-V power curves [Measured S+T (380 lux) to Measured S+T (1010 lux)] peak
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